A mud centrifuge for oil drilling

Abstract

The present application provides a kind of mud centrifuge for petroleum drilling, including support, the upper side of the support is equipped with centrifugal cylinder, centrifugal cylinder is equipped with fixed cylinder, first rotating drum is rotatably fitted in fixed cylinder, second rotating drum is rotatably fitted in first rotating drum, feed pipe is rotatably fitted in fixed cylinder, one end of feed pipe is located in second rotating drum, and the lateral side of feed pipe is equipped with first spiral plate, the lateral side of first rotating drum is equipped with second spiral plate, a plurality of first filter holes are formed in the lower side of fixed cylinder, and the lower side of fixed cylinder is equipped with anti-blocking assembly corresponding to first filter hole.In the present application, first rotating drum is installed in fixed cylinder, second rotating drum is installed in first rotating drum, one end of feed pipe is installed in second rotating drum, first spiral plate is installed on the lateral side of feed pipe, and second spiral plate is installed on the lateral side of first rotating drum, which can perform twice centrifugal separation on mud, so that mud separation is more thorough, and separation effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum engineering, in particular to a mud centrifuge for petroleum drilling. BACKGROUND

[0002] The centrifuge for purifying drilling mud is the last stage of the solid control system of the drilling fluid, can effectively control the density of the drilling mud, and remove the harmful solid phase in the drilling mud, which has great significance for drilling production. The existing mud centrifuge mainly comprises a centrifuge cylinder and a screw rod, and the centrifuge cylinder and the screw rod are driven to rotate by a motor to generate centrifugal force to separate mud and water. However, since the drilling mud contains a large amount of impurities, the mud and water are easily adhered to the screw rod, and the viscosity of the mud is relatively high during the solid-liquid separation of the mud centrifuge, which reduces the separation effect of the existing centrifuge, reduces the separation efficiency of the drilling mud, and reduces the practicability of the device.

[0003] Therefore, the present application provides a mud centrifuge for petroleum drilling. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application aims to provide a mud centrifuge for petroleum drilling to solve the problems in the background art. The present application can perform twice centrifugal separation on the mud, making the mud separation more thorough and improving the separation effect. The separated water and mud can be filtered to improve the separation quality and reduce the water content of the finally separated mud. The mud adhered to the first spiral plate can be scraped off.

[0005] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme: a mud centrifuge for petroleum drilling, comprising a support, a centrifuge cylinder is arranged on the upper side of the support, a fixed cylinder is arranged in the centrifuge cylinder, a first rotating cylinder is rotatably arranged in the fixed cylinder, a second rotating cylinder is rotatably arranged in the first rotating cylinder, a feeding pipe is rotatably arranged in the fixed cylinder, one end of the feeding pipe is located in the second rotating cylinder, a first spiral plate is arranged on the side of the feeding pipe, a second spiral plate is arranged on the side of the first rotating cylinder, a plurality of first filter holes are arranged on the lower side of the fixed cylinder, a plurality of anti-blocking assemblies corresponding to the first filter holes are arranged on the lower side of the fixed cylinder, the anti-blocking assemblies correspond to the second spiral plate, a plurality of second filter holes are arranged on the side of the second rotating cylinder and the side of the first rotating cylinder, the second filter holes correspond to the first spiral plate, and a plurality of scraping plates corresponding to the second spiral plate are arranged in the fixed cylinder.

[0006] Further, the first spiral plate is located in the second rotating cylinder, and a first thimble is arranged on the side of the first spiral plate, and the first thimble corresponds to the second filter hole.

[0007] Further, the anti-blocking assembly comprises an inclined plate arranged on the lower side of the fixed cylinder, a second thimble is arranged on the upper side of the inclined plate, and the second thimble corresponds to the first filter hole.

[0008] Further, the anti-blocking assembly further comprises a pressing rod fixed to the upper side of the inclined plate, one end of the pressing rod being located in the fixed cylinder.

[0009] Further, a spring is arranged between the inclined plate and the fixed cylinder.

[0010] Further, a water outlet and a mud outlet are formed in the lower side of the centrifugal cylinder, and the water outlet and the mud outlet are in communication with the fixed cylinder.

[0011] Further, one end of the fixed cylinder close to the mud outlet is a conical cylinder, and the other end of the fixed cylinder close to the water outlet is a cylindrical cylinder.

[0012] Further, a first motor is arranged on one side of the centrifugal cylinder, the output end of the first motor being fixedly connected with a first rotating cylinder, the first rotating cylinder being fixedly connected with a second rotating cylinder, and the first rotating cylinder and the second rotating cylinder rotating on the same axis.

[0013] Further, a second motor is arranged on the other side of the centrifugal cylinder, the output end of the second motor being in transmission connection with the feeding pipe.

[0014] Further, the output end of the second motor and one end of the feeding pipe are both fixedly connected with a rotating disc, and a belt is arranged between the two rotating discs.

[0015] The petroleum drilling mud centrifuge comprises a fixed cylinder, a first rotating cylinder, a second rotating cylinder, a feeding pipe, a first spiral plate, a second spiral plate, a first filter hole, a second filter hole, an anti-blocking assembly and a scraper.

[0016] 1. The first rotating cylinder is installed in the fixed cylinder, the second rotating cylinder is installed in the first rotating cylinder, one end of the feeding pipe is installed in the second rotating cylinder, the first spiral plate is installed on the circumferential side of the feeding pipe, and the second spiral plate is installed on the circumferential side of the first rotating cylinder, so that the mud can be subjected to twice centrifugal separation, the mud separation is more thorough, and the separation effect is improved.

[0017] 2. The first filter hole is formed in the lower side of the fixed cylinder, and the second filter hole is formed on the circumferential side of the second rotating cylinder and the circumferential side of the first rotating cylinder, so that the separated water and mud can be filtered, the separation quality is improved, and the water content of the finally separated mud is low.

[0018] 3. The anti-blocking assembly is installed on the lower side of the fixed cylinder, the first filter hole is dredged each time the first spiral plate rotates and separates, so that the first filter hole can be prevented from being blocked, and the scraper is installed in the fixed cylinder, so that the mud adhered to the first spiral plate can be scraped off. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole assembly perspective view of the petroleum drilling mud centrifuge.

[0020] Figure 2 Assembling profile structure schematic diagram of the whole mud centrifuge for oil drilling of the present application;

[0021] Figure 3 Assembling profile structure schematic diagram of the fixed cylinder and the inclined plate in the mud centrifuge for oil drilling of the present application;

[0022] Figure 4 Assembling three-dimensional structure schematic diagram of the fixed cylinder in the mud centrifuge for oil drilling of the present application;

[0023] Figure 5 Assembling three-dimensional structure schematic diagram of the first rotating cylinder in the mud centrifuge for oil drilling of the present application;

[0024] Figure 6 Assembling three-dimensional structure schematic diagram of the feed pipe in the mud centrifuge for oil drilling of the present application;

[0025] In the figure: 1, support; 2, first motor; 3, second motor; 4, centrifugal cylinder; 5, feed pipe; 6, belt; 7, rotating disc; 8, water outlet; 9, mud outlet; 10, fixed cylinder; 11, first rotating cylinder; 12, second rotating cylinder; 14, through slot; 15, first spiral plate; 16, second spiral plate; 17, scraper; 18, first thimble; 19, anti-blocking assembly; 1901, inclined plate; 1902, second thimble; 1903, pressing rod; 1904, spring; 20, first filter hole; 21, second filter hole. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0027] Please refer to Figures 1 to 6The application provides a technical scheme: a mud centrifuge for oil drilling, which comprises a support 1, a centrifuge cylinder 4 is arranged on the upper side of the support 1, a fixed cylinder 10 is arranged in the centrifuge cylinder 4, a first rotating cylinder 11 is rotatably arranged in the fixed cylinder 10, a second rotating cylinder 12 is rotatably arranged in the first rotating cylinder 11, a feeding pipe 5 is rotatably arranged in the fixed cylinder 10, one end of the feeding pipe 5 is located in the second rotating cylinder 12, a first spiral plate 15 is arranged on the side of the feeding pipe 5, a second spiral plate 16 is arranged on the side of the first rotating cylinder 11, a plurality of first filter holes 20 are formed in the lower side of the fixed cylinder 10, a plurality of anti-blocking assemblies 19 corresponding to the first filter holes 20 are arranged on the lower side of the fixed cylinder 10, the anti-blocking assemblies 19 correspond to the second spiral plate 16, a plurality of second filter holes 21 are formed in the side of the second rotating cylinder 12 and the side of the first rotating cylinder 11, the second filter holes 21 correspond to the first spiral plate 15, and a plurality of scraping plates 17 corresponding to the second spiral plate 16 are arranged in the fixed cylinder 10.

[0028] In the embodiment, the first spiral plate 15 is located in the second rotating cylinder 12, a first thimble 18 is arranged on the side of the first spiral plate 15, the first thimble 18 corresponds to the second filter hole 21, the anti-blocking assembly 19 comprises an inclined plate 1901 arranged on the lower side of the fixed cylinder 10, a second thimble 1902 is arranged on the upper side of the inclined plate 1901, the second thimble 1902 corresponds to the first filter hole 20, the anti-blocking assembly 19 further comprises a pressing rod 1903 fixed on the upper side of the inclined plate 1901, one end of the pressing rod 1903 is located in the fixed cylinder 10, a spring 1904 is arranged between the inclined plate 1901 and the fixed cylinder 10, a water outlet 8 and a mud outlet 9 are formed in the lower side of the centrifuge cylinder 4, the water outlet 8 and the mud outlet 9 are in communication with the fixed cylinder 10, one end of the fixed cylinder 10 close to the mud outlet 9 is a conical cylinder, one end of the fixed cylinder 10 close to the water outlet 8 is a cylindrical cylinder, a first motor 2 is arranged on one side of the centrifuge cylinder 4, the output end of the first motor 2 is fixedly connected with the first rotating cylinder 11, the first rotating cylinder 11 is fixedly connected with the second rotating cylinder 12, the first rotating cylinder 11 and the second rotating cylinder 12 rotate on the same axis, a second motor 3 is arranged on the other side of the centrifuge cylinder 4, the output end of the second motor 3 is drivingly connected with the feeding pipe 5, the output end of the second motor 3 and one end of the feeding pipe 5 are fixedly connected with a rotating disc 7, a belt 6 is arranged between the two rotating discs 7, the inclined plate 1901 is in communication with the water outlet 8, and a through groove 14 is formed in the side of the second rotating cylinder 12.

[0029] Specifically, when the mud is separated by the mud centrifuge, only the first motor 2 and the second motor 3 are started, the output ends of the first motor 2 and the second motor 3 rotate reversely, the output end of the first motor 2 drives the first rotating drum 11 and the second rotating drum 12 to rotate, the output end of the second motor 3 drives the feeding pipe 5 to rotate through the belt 6 and the rotating disc 7, then the mud is sent into the second rotating drum 12 through the feeding pipe 5, the mud is centrifugally separated for the first time, and the mud is filtered for the first time through the second filter hole 21, at the same time, the first spiral plate 15 is driven to rotate by the feeding pipe 5, the first spiral plate 15 pushes the mud to flow between the first rotating drum 11 and the fixed drum 10, the first rotating drum 11 is rotated to centrifugally separate the mud for the second time, the second spiral plate 16 pushes the mud to move to the position close to the mud outlet 9, the first rotating drum 11 and the fixed drum 10 extrude the mud, so that the water content in the mud is reduced, the first filter hole 20 filters the mud for the second time, then the mud leaks out of the mud outlet 9, and the water flows out of the water outlet 8.

[0030] When the mud is separated, the first spiral plate 15 rotates to drive the first top pin 18 to enter the second filter hole 21, so as to dredge the second filter hole 21, and prevent the second filter hole 21 from being blocked, at the same time, the scraper 17 scrapes the mud attached to the second spiral plate 16, so that the mud can be fully separated and filtered.

[0031] When the first rotating drum 11 rotates, the second spiral plate 16 periodically extrudes and pushes the pressing rod 1903 downward, so that the inclined plate 1901 slides downward, the second top pin 1902 is separated from the first filter hole 20, and the spring 1904 is compressed, so that the water extruded by the fixed drum 10 and the first rotating drum 11 from the mud can flow to the inclined plate 1901 and then flow out of the water outlet 8, when the second spiral plate 16 no longer extrudes the pressing rod 1903, the spring 1904 rebounds to drive the inclined plate 1901 and the second top pin 1902 to reset, so as to dredge the first filter hole 20, and prevent the first filter hole 20 from being blocked.

[0032] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A mud centrifuge for oil drilling, comprising a support frame (1), characterized in that, The support (1) is equipped with a centrifuge cylinder (4) on its upper side. A fixed cylinder (10) is installed inside the centrifuge cylinder (4). A first rotating cylinder (11) is rotatably fitted inside the fixed cylinder (10). A second rotating cylinder (12) is rotatably fitted inside the first rotating cylinder (11). A feed pipe (5) is rotatably fitted inside the fixed cylinder (10). One end of the feed pipe (5) is located inside the second rotating cylinder (12). A first spiral plate (15) is installed around the feed pipe (5). A second spiral plate (16) is installed around the first rotating cylinder (11). The lower part of the fixed cylinder (10) is... Multiple first filter holes (20) are provided on the side. An anti-clogging component (19) corresponding to the first filter holes (20) is installed on the lower side of the fixed cylinder (10). The anti-clogging component (19) corresponds to the second spiral plate (16). Multiple second filter holes (21) are provided on the periphery of the second rotating cylinder (12) and the periphery of the first rotating cylinder (11). The second filter holes (21) correspond to the first spiral plate (15). Multiple scrapers (17) corresponding to the second spiral plate (16) are installed inside the fixed cylinder (10). The first spiral plate (15) Located inside the second rotating cylinder (12), and with the side of the first spiral plate (15) equipped with a first ejector pin (18), the first ejector pin (18) corresponds to the second filter hole (21). The anti-clogging assembly (19) includes an inclined plate (1901) installed on the lower side of the fixed cylinder (10), and a second ejector pin (1902) installed on the upper side of the inclined plate (1901), the second ejector pin (1902) corresponding to the first filter hole (20). The anti-clogging assembly (19) also includes a pressure rod (1903) fixed on the upper side of the inclined plate (1901). 3) One end is located inside the fixed cylinder (10). A spring (1904) is installed between the inclined plate (1901) and the fixed cylinder (10). A first motor (2) is installed on one side of the centrifuge cylinder (4). The output end of the first motor (2) is fixedly connected to the first rotating cylinder (11). The first rotating cylinder (11) is fixedly connected to the second rotating cylinder (12). The first rotating cylinder (11) and the second rotating cylinder (12) rotate coaxially. A second motor (3) is installed on the other side of the centrifuge cylinder (4). The output end of the second motor (3) is connected to the feed pipe (5) for transmission.

2. The oil drilling mud centrifuge according to claim 1, characterized in that: The centrifuge tube (4) has a water outlet (8) and a mud outlet (9) on its lower side, and both the water outlet (8) and the mud outlet (9) are connected to the fixed tube (10).

3. A mud centrifuge for oil drilling according to claim 2, characterized in that: The end of the fixed cylinder (10) near the mud outlet (9) is a conical cylinder, and the end of the fixed cylinder (10) near the water outlet (8) is a cylindrical cylinder.

4. The mud centrifuge for oil drilling according to claim 1, characterized in that: The output end of the second motor (3) and one end of the feed pipe (5) are both fixed with turntables (7), and a belt (6) is installed between the two turntables (7).

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